CAJ | 학술논문

利用林木微缩模型构建不同空间分布的林分,测量林分的双向反射率因子( bidirectional reflectance factor, BRF),并对其反射光谱进行了分析研究。结果显示：基于微缩模型得到的观测结果整体较符合实际森林的特征,与三维模型模拟结果一致；在近红外波段,光谱曲线呈典型的“碗边效应”,在观测主平面“热点效应”较为明显。研究结果证实林木微缩模型可以用于森林BRF研究。对不同林木模型的分布状态与不同的地形条件的测量结果对比分析后发现,林木分布的密度和坡度是较为敏感的参数,其特征与规律性有助于建模反演地表信息。
이용림목미축모형구건불동공간분포적림분,측량림분적쌍향반사솔인자( bidirectional reflectance factor, BRF),병대기반사광보진행료분석연구。결과현시：기우미축모형득도적관측결과정체교부합실제삼림적특정,여삼유모형모의결과일치；재근홍외파단,광보곡선정전형적“완변효응”,재관측주평면“열점효응”교위명현。연구결과증실림목미축모형가이용우삼림BRF연구。대불동림목모형적분포상태여불동적지형조건적측량결과대비분석후발현,림목분포적밀도화파도시교위민감적삼수,기특정여규률성유조우건모반연지표신식。
Based on mini-tree models, the authors constructed forest stands with different distributions to measure bidirectional reflectance factor ( BRF) by a mini goniometer. The results show that the observed BRF of simulated forest canopies is reasonable and inter - compared with a three - dimensional BRF model. The reflectance in different view directions indicates a typical “bowl” shape in the near-infrared band, with significant “hot spot”effects in solar principal plane. The study has confirmed that mini-tree models can be applied to the research on forest BRF. The comparisons between different spatial distributions and terrain conditions of tree models demonstrate that forest density and slope have certain effects on forest BRF. Therefore, their features and regularity can contribute to the inversion of the land surface parameters through modeling.